This patch removes extended delay bit on GSCSI reads/writes ops, the
performance will be significanly better.
Signed-off-by: Wen Xiong <wenxiong@xxxxxxxxxxxxxxxxxx>
---
drivers/scsi/ipr.c | 6 +++++-
drivers/scsi/ipr.h | 1 +
2 files changed, 6 insertions(+), 1 deletion(-)
Index: b/drivers/scsi/ipr.c
===================================================================
--- a/drivers/scsi/ipr.c 2014-01-21 11:31:51.747454658 -0600
+++ b/drivers/scsi/ipr.c 2014-01-21 11:32:14.949015785 -0600
@@ -1143,6 +1143,7 @@ static void ipr_init_res_entry(struct ip
res->add_to_ml = 0;
res->del_from_ml = 0;
res->resetting_device = 0;
+ res->reset_occurred = 0;
res->sdev = NULL;
res->sata_port = NULL;
@@ -5015,6 +5016,7 @@ static int __ipr_eh_dev_reset(struct scs
} else
rc = ipr_device_reset(ioa_cfg, res);
res->resetting_device = 0;
+ res->reset_occurred = 1;
LEAVE;
return rc ? FAILED : SUCCESS;
@@ -6183,8 +6185,10 @@ static int ipr_queuecommand(struct Scsi_
ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_ULEN_CHK;
ioarcb->cmd_pkt.flags_hi |= IPR_FLAGS_HI_NO_LINK_DESC;
- if (ipr_is_gscsi(res))
+ if (ipr_is_gscsi(res) && res->reset_occurred) {
+ res->reset_occurred = 0;
ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_DELAY_AFTER_RST;
+ }
ioarcb->cmd_pkt.flags_lo |= IPR_FLAGS_LO_ALIGNED_BFR;
ioarcb->cmd_pkt.flags_lo |= ipr_get_task_attributes(scsi_cmd);
}
Index: b/drivers/scsi/ipr.h
===================================================================
--- a/drivers/scsi/ipr.h 2014-01-21 11:31:55.587764485 -0600
+++ b/drivers/scsi/ipr.h 2014-01-21 11:32:14.957453279 -0600
@@ -1252,6 +1252,7 @@ struct ipr_resource_entry {
u8 add_to_ml:1;
u8 del_from_ml:1;
u8 resetting_device:1;
+ u8 reset_occurred:1;
u32 bus; /* AKA channel */
u32 target; /* AKA id */
--
--
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